Not Available, Southern and central Africa
Southern and central Africa
Green, Black, White, Grey, Green, Black, White, Grey, Green, Black, gray, Black, Green, Black, gray, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
Uneven, UnevenArthur Thomas, Gemstones (2009), Splintery
Not Available
Ca 2(Mg,Fe) 5Si 8O 22(OH) 2Ulrich Henn and Claudio C.
SiO 2 (with trace Cr minerals) Gemdat.org , Management Team (2012)